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R. Topcor 300mm f2.8


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Got a Chinese Pentax 645 to K adapter, and played with the new 300/2.8 on my Pentax K-1. The adaptation allows focus well past infinity, I'd say they took 1mm too much off the back of the lens. A building 2000 feet away comes in focus at 150 feet on the focusing scale. (I can't imagine the Chinese adapter would be that far off.) Better than not reaching infinity, and actually quite easy to correct. (Remove tripod socket, loosen set screw, and screw front of lens in and out to collimate.)

 

With a tripod, it's sharp. These shots are wide-open, of course.

 

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Edited by john_shriver
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